From f48e6112537d6fee1e24e6849978f7ec9b2aa358 Mon Sep 17 00:00:00 2001
From: xiongziliang <771730766@qq.com>
Date: Sun, 29 Dec 2019 15:55:20 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96http=E6=96=87=E4=BB=B6?=
 =?UTF-8?q?=E6=9C=8D=E5=8A=A1=E5=99=A8=E6=80=A7=E8=83=BD?=
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---
 src/Http/HttpBody.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/Http/HttpBody.h b/src/Http/HttpBody.h
index 9428ab07..66443ad0 100644
--- a/src/Http/HttpBody.h
+++ b/src/Http/HttpBody.h
@@ -72,6 +72,7 @@ public:
      * @param cb 回调函数
      */
     virtual void readDataAsync(uint32_t size,const function<void(const Buffer::Ptr &buf)> &cb){
+#if 0
         if(size >= remainSize()){
             //假如剩余数据很小，那么同步获取(为了优化性能)
             cb(readData(size));
@@ -85,6 +86,12 @@ public:
                 cb(strongSelf->readData(size));
             }
         });
+#else
+        //由于unix和linux是通过mmap的方式读取文件，所以把读文件操作放在后台线程并不能提高性能
+        //反而会由于频繁的线程切换导致性能降低以及延时增加，所以我们默认同步获取文件内容
+        //(其实并没有读，拷贝文件数据时在内核态完成文件读)
+        cb(readData(size));
+#endif
     }
 private:
     EventPoller::Ptr _async_read_thread;